Enter Decagon Info Below

The of a decagon is
  

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The area of an decagon is 5

Calculate side, perimeter

Calculate side:

A = 5/2s2√5 + 2√5

A = 2.5s2(3.0776835371753)

s2  =  2 x A
  5 x 3.0776835371753

s2  =  2 x 5
  5 x 3.0776835371753

s2  =  10
  15.388417685876

s2 = 0.64983939246581

s = √0.64983939246581

s = 0.80612616411193

Calculate Perimeter:

P = 10 x side

P = 10 x 0.80612616411193

P = 8.0612616411193

Calculate Sum of the Interior Angles:

Interior Angle Sum = (sides - 2) x 180°

Interior Angle Sum = (10 - 2) x 180°

Interior Angle Sum = 8 x 180°

Interior Angle sum = 1440°

Calculate decagon diagonals

Diagonals  =  n(n - 3)
  2

Diagonals  =  10(10 - 3)
  2

Diagonals  =  10(7)
  2

Diagonals  =  70
  2

Diagonals = 35

Calculate diagonals from 1 vertex:

1 vertex Diagonals = n - 3

1 vertex Diagonals = 10 - 3

1 vertex Diagonals = 7

Calculate number of Δ from 1 vertex:

Triangles = N - 2

Triangles = 10 - 2

Triangles = 8

Other Properties:

Sides (Edges) = 10

Faces = 1

Vertices = 10

A = 5
P = 8.0612616411193
Sides (Edges) = 10
Faces = 1
Vertices = 10


Keep Practicing
Generate Practice Problem    Take the Quiz
What is the Answer?
A = 5
P = 8.0612616411193
Sides (Edges) = 10
Faces = 1
Vertices = 10
How does the Decagon Calculator work?
Free Decagon Calculator - Solves for the side, perimeter, and area of a decagon.
This calculator has 1 input.

What 1 formula is used for the Decagon Calculator?

P=10s

For more math formulas, check out our Formula Dossier

What 4 concepts are covered in the Decagon Calculator?

area
Number of square units covering the shape
decagon
10 sided polygon or 10-gon
perimeter
The distance around a shape or object
side
line segment joining two vertices in a polygon also known as an edge
Example calculations for the Decagon Calculator
  1. Decagon side = 1
  2. Decagon area = 1
  3. Decagon perimeter = 1
  4. Decagon side = 2
  5. Decagon area = 2
  6. Decagon perimeter = 2
  7. Decagon side = 3
  8. Decagon area = 3
  9. Decagon perimeter = 3
  10. Decagon side = 4
  11. Decagon area = 4
  12. Decagon perimeter = 4
  13. Decagon side = 5
  14. Decagon area = 5
  15. Decagon perimeter = 5
  16. Decagon side = 6
  17. Decagon area = 6
  18. Decagon perimeter = 6
  19. Decagon side = 7
  20. Decagon area = 7
  21. Decagon perimeter = 7
  22. Decagon side = 8
  23. Decagon area = 8
  24. Decagon perimeter = 8
  25. Decagon side = 9
  26. Decagon area = 9
  27. Decagon perimeter = 9
  28. Decagon side = 10
  29. Decagon area = 10
  30. Decagon perimeter = 10
  31. Decagon side = 11
  32. Decagon area = 11
  33. Decagon perimeter = 11
  34. Decagon side = 12
  35. Decagon area = 12
  36. Decagon perimeter = 12
  37. Decagon side = 13
  38. Decagon area = 13
  39. Decagon perimeter = 13
  40. Decagon side = 14
  41. Decagon area = 14
  42. Decagon perimeter = 14
  43. Decagon side = 15
  44. Decagon area = 15
  45. Decagon perimeter = 15
  46. Decagon side = 16
  47. Decagon area = 16
  48. Decagon perimeter = 16
  49. Decagon side = 17
  50. Decagon area = 17
  51. Decagon perimeter = 17
  52. Decagon side = 18
  53. Decagon area = 18
  54. Decagon perimeter = 18
  55. Decagon side = 19
  56. Decagon area = 19
  57. Decagon perimeter = 19
  58. Decagon side = 20
  59. Decagon area = 20
  60. Decagon perimeter = 20
Decagon Calculator Video

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